Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 211407
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
707 AM PDT THU AUG 21 2014

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

SUMMARY...THE 06Z NCEP SFC ANALYSIS SHOWS LOW PRES CNTRD NW OF
THE PZ5 WTRS NEAR 51N136W WITH A WARM FNT EXTNDG SE INTO THE WRN
PZ5 WTRS AND A COLD FNT TRAILING W OF LOW CNTR. ASCAT PASSES FROM
05Z THRU 06Z INDICATE MAINLY LIGHT WINDS WITH AN SWATH OF 20 TO
25 KT WINDS OVER THE SRN ORE/NOCAL CSTL WTRS. THE LOW WILL MOVE SE
OVER THE WASH OFSHR WTRS THU...THEN DSIPT AS IT REACHES THE WASH
CST THU NITE. THE COLD FNT WILL MOVE SE OVER THE WASH/ORE OFSHR
AREAS THU...THEN DSIPT THU NITE. A LOW PRES TROF WILL PERSIST NEAR
THE CALIF CST THRU THE FCST PRD...WHILE STRENGTHENING FRI INTO
MON. LONGER PERIOD S AND SW SWELL FROM T.S. LOWELL IS EXPCTD TO
ENTER THE SRN PZ6 ZONES FROM THU THRU MON NITE. LOW PRES TROF NR
CA CST STRENGTHENS FRI INTO MON. OTHW...A HI PRES RDG WILL BLD E
INTO THE WASH/ORE/NOCAL OFSHR WTRS DURING THE FCST PRD. MAX WINDS
OF 30 KT ARE EXPCTD OVER THE ERN PART OF THE SRN ORE/NOCAL OFSHR
WTRS AND CSTL WTRS ARND SAT NITE AND SUN.

MODELS...THE NAM AND MED RNG MDLS ARE IN VRY GUD AGREEMNT THRU
THE FCST PRD. THE MDLS KEEP THE WINDS SUB-GALE OVER ALL OF THE
ZONES DURING THE FCST PRD. WILL USE THE REPRESENTATIVE GFS BLENDED
10M/30M TO POPULATE THE WIND GRIDS THRU THE FCST PRD. AM NOT
PLANNING TO MAKE ANY SIGNIF CHANGES TO THE CURRENT FCST TREND.

SEAS...INITIALIZED 8 FT OR LESS ACROSS THE OFSHR ZONES IN 12Z RP1
SEA STATE ANALYSIS AND IS CLOSE TO THE MULTIGRID WW3 AND ECMWF
WAM GUIDANCE. THE SEA STATE MDLS ARE IN GUD AGREEMNT WITH EACH
OTHER THRU THE FCST PRD...SO WILL USE THE ENP VERSION OF THE
MWW3 TO POPULATE THE WAVE HT GRIDS.

.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS... NONE.

.PZ6 CALIFORNIA WATERS... NONE.

$$

.FORECASTER SCOVIL. OCEAN PREDICTION CENTER.


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